I like their documentation which is easy to get started and work on. Their examples are probably best thing to check because it really helps to make faster progress in adapting it in your application. Review collected by and hosted on G2.com.

I think their website is kind of old and I believe it could be improved a lot. Other than that I believe some features like copying the code by one click should be added on the website for better and faster use for the users. Review collected by and hosted on G2.com.